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59A120A6-15-4S — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

59A120A6-15-4S: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING BODY, overall_length: 1.740 INCHES NOMINAL IN, connection_type: EXTERNAL QUICK DISCONNECT SECOND QUICK DISCONNECT END, connection_style: PLAIN ALL ENDS, style_designator: MALE COUPLING HALF, nominal_thread_size: 0.250 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-052-5228, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
59A120A6-15-4S
NSN: 4730-01-052-5228
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
overall_length1.740 INCHES NOMINAL IN
connection_typeEXTERNAL QUICK DISCONNECT SECOND QUICK DISCONNECT END
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.250 INCHES ALL ENDS IN
quick_disconnect_methodPUSH-LOCK SECOND QUICK DISCONNECT END
thread_series_designatorNPT ALL ENDS
mating_end_identificationROYLYN INC. COUPLING HALF,QUICK DISCONNECT,PART NO. 1031-6
NSN4730-01-052-5228
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 59A120A6-15-4S · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CONNECTION STYLE: PLAIN ALL ENDS
•
MATING END IDENTIFICATION: ROYLYN INC. COUPLING HALF,QUICK DISCONNECT,PART NO. 1031-6
•
CONNECTION TYPE: EXTERNAL QUICK DISCONNECT SECOND QUICK DISCONNECT END
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
•
MATERIAL: STEEL CORROSION RESISTING BODY
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN ALL ENDS
MATING END IDENTIFICATIONROYLYN INC. COUPLING HALF,QUICK DISCONNECT,PART NO. 1031-6
CONNECTION TYPEEXTERNAL QUICK DISCONNECT SECOND QUICK DISCONNECT END
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST FLUID END CONNECTION
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH1.740 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
MATERIALSTEEL CORROSION RESISTING BODY
QUICK DISCONNECT METHODPUSH-LOCK SECOND QUICK DISCONNECT END
THREAD SERIES DESIGNATORNPT ALL ENDS
OTHER ITEMS IN FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4730-00-000-1895 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008
SUBSTITUTES & CROSS-REFERENCES 1
59-A-120-AG-15Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 59A120A6-15-4S?
59A120A6-15-4S is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace 59A120A6-15-4S?
There is 1 known substitute for 59A120A6-15-4S: 59-A-120-AG-15. Substitute compatibility should be verified for your specific system.
What is the NSN for 59A120A6-15-4S?
59A120A6-15-4S is cataloged in the U.S. Government catalog under NSN 4730-01-052-5228. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.